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Preparation method of reactive nitrogen arc fusion coating of titanium carbonitride/iron-based alloy composite coating

An iron-based alloy and composite coating technology, which is applied in the direction of heating inorganic powder coating, etc., can solve the problems of coarse ceramic phase, uneven distribution, and unstable coating performance, etc., achieve low cost, improve preparation efficiency, and simple method Effect

Active Publication Date: 2016-04-20
山东蒙星机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above technologies, most of the ceramic phases as hard phases need to be pre-synthesized, the ceramic phases in the coating are coarse and unevenly distributed, the ceramic / metal bonding interface is easily polluted, and the coating performance is not stable enough

Method used

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  • Preparation method of reactive nitrogen arc fusion coating of titanium carbonitride/iron-based alloy composite coating
  • Preparation method of reactive nitrogen arc fusion coating of titanium carbonitride/iron-based alloy composite coating
  • Preparation method of reactive nitrogen arc fusion coating of titanium carbonitride/iron-based alloy composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Mix titanium powder (see Table 1 for chemical composition) and graphite powder (purity not less than 98%) according to the titanium-carbon molar ratio of 1:1, use alcohol with a concentration of 95% as the ball milling medium, and use a DQM type planetary Type ball mill ball milling, the ball-to-material ratio is 3:1, the ball milling speed is 120r / min, and the ball milling time is 10h;

[0020] Table 1 Chemical composition of titanium powder

[0021]

[0022] (2) Put the mixed powder after ball milling into a drying oven for drying, the drying temperature is 50°C, and the drying time is 10 hours;

[0023] (3) Dilute the polyacrylic acid wax organic binder with alcohol to adjust the mixed powder into a slurry, and the mass percentage of the organic binder and the mixed powder in the slurry is 1.5%;

[0024] (4) Polish the pre-coated surface of the Q235 steel specimen with 200 mesh sandpaper until metallic luster appears;

[0025] (5) Clean the polished surface ...

Embodiment 2

[0032] (1) Mix titanium powder (see Table 2 for chemical composition) and graphite powder (purity not less than 98%) according to the titanium-carbon molar ratio of 1:1, use alcohol with a concentration of 95% as the ball milling medium, and use a DQM type planetary Type ball mill ball milling, the ball-to-material ratio is 2:1, the ball milling speed is 150r / min, and the ball milling time is 6h;

[0033] Table 2 Chemical Composition of Titanium Powder

[0034]

[0035] (2) Put the mixed powder after ball milling into a drying oven for drying, the drying temperature is 45°C, and the drying time is 12 hours;

[0036] (3) Dilute the polybutene organic binder with alcohol to adjust the mixed powder into a slurry, and the mass percentage of the organic binder and the mixed powder in the slurry is 1%;

[0037] (4) Polish the pre-coated surface of the Q235 steel specimen with 200 mesh sandpaper until metallic luster appears;

[0038] (5) Clean the polished surface with 95% alco...

Embodiment 3

[0045] (1) Mix titanium powder (see Table 1 for chemical composition) and graphite powder (purity not less than 98%) according to the titanium-carbon molar ratio of 1:1, use alcohol with a concentration of 95% as the ball milling medium, and use a DQM type planetary Type ball mill ball milling, the ball-to-material ratio is 5:1, the ball milling speed is 100r / min, and the ball milling time is 12h;

[0046](2) Put the mixed powder after ball milling into a drying oven for drying, the drying temperature is 60°C, and the drying time is 6 hours;

[0047] (3) Dilute the polystyrene organic binder with alcohol to adjust the mixed powder into a slurry, and the mass percentage of the organic binder and the mixed powder in the slurry is 2%;

[0048] (4) Polish the pre-coated surface of the Q235 steel specimen with 200 mesh sandpaper until metallic luster appears;

[0049] (5) Clean the polished surface with 95% alcohol and dry it with hot air.

[0050] (6) Brush the slurry evenly on ...

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Abstract

The invention provides a reaction nitrogen arc molten coating preparation method for a titanium carbonitride / iron-based alloy composite coating, and belongs to the field of surface engineering technology. In the preparation method, industrial titanium powder and graphite powder are employed as raw materials and are mixed into a slurry by adding alcohol and an organic binder; the slurry is coated on the surface of an iron-based workpiece by brush coating; hard phase titanium carbonitride is synthesized by using reactions among titanium, carbon and nitrogen via a direct current TIG welding molten coating process under the protection of nitrogen; and the titanium carbonitride / iron-based alloy composite coating with titanium carbonitride as a hard phase and iron-based alloy as a matrix phase is obtained. The composite coating has the advantages of large thickness, high density, high hardness and excellent wear resistance. The preparation method is simple in equipment, convenient for operation and low in cost, and has no pollutions.

Description

technical field [0001] The invention belongs to the technical field of preparation of ceramic / metal composite coatings, and in particular relates to a method for in-situ synthesis of titanium carbonitride / iron-based alloy composite coatings on the surface of iron-based metals by adopting a TIG welding fusion coating method under nitrogen protection. technical background [0002] Titanium carbonitride is a non-oxide material with excellent performance and wide application. It is also a coating material with excellent performance. It has the characteristics and advantages of titanium nitride and titanium carbide. Compared with titanium carbide, titanium carbonitride has better plasticity and wear resistance; compared with titanium nitride, titanium carbonitride has better anti-adhesive wear and anti-abrasive wear properties, and a lower friction factor. At present, plasma chemical vapor deposition, medium temperature chemical vapor deposition, hollow cathode ion plating, ion b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
Inventor 郝建军李建昌马跃进赵建国马璐萍
Owner 山东蒙星机械有限公司